code: def postclone_checkout_commit(repo, target_commit, remote="origin"):
      """Helper to check out a specific target commit in a fresh clone.
  
      Will not check (again) if current commit and target commit are already
      the same!
      """
      # record what branch we were on right after the clone
      active_branch = repo.get_active_branch()
      corr_branch = repo.get_corresponding_branch(branch=active_branch)
      was_adjusted = bool(corr_branch)
      repo_orig_branch = corr_branch or active_branch
      # if we are on a branch this hexsha will be the tip of that branch
      repo_orig_hexsha = repo.get_hexsha(repo_orig_branch)
      # make sure we have the desired commit locally
      # expensive and possibly error-prone fetch conditional on cheap
      # local check
      if not repo.commit_exists(target_commit):
          try:
              repo.fetch(remote=remote, refspec=target_commit)
          except CommandError as e:
              CapturedException(e)
              pass
          # instead of inspecting the fetch results for possible ways
          # with which it could failed to produced the desired result
          # let's verify the presence of the commit directly, we are in
          # expensive-land already anyways
          if not repo.commit_exists(target_commit):
              # there is nothing we can do about this
              # MIH thinks that removing the clone is not needed, as a likely
              # next step will have to be a manual recovery intervention
              # and not another blind attempt
              raise ValueError(
                  "Target commit %s does not exist in the clone, and "
                  "a fetch that commit from remote failed"
                  % target_commit[:8]
              )
      # checkout the desired commit
      repo.call_git(["checkout", target_commit])
      # did we detach?
      if repo_orig_branch and not repo.get_active_branch():
          # trace if current state is a predecessor of the branch_hexsha
          lgr.debug(
              "Detached HEAD after resetting worktree of %s "
              "(original branch: %s)",
              repo,
              repo_orig_branch,
          )
          if (
              repo.get_merge_base([repo_orig_hexsha, target_commit])
              == target_commit
          ):
              # we assume the target_commit to be from the same branch,
              # because it is an ancestor -- update that original branch
              # to point to the target_commit, and update HEAD to point to
              # that location
              lgr.info(
                  "Reset branch '%s' to %s (from %s) to "
                  "avoid a detached HEAD",
                  repo_orig_branch,
                  target_commit[:8],
                  repo_orig_hexsha[:8],
              )
              branch_ref = "refs/heads/%s" % repo_orig_branch
              repo.update_ref(branch_ref, target_commit)
              repo.update_ref("HEAD", branch_ref, symbolic=True)
              if was_adjusted:
                  # Note: The --force is needed because the adjust branch already
                  # exists.
                  repo.adjust(options=["--unlock", "--force"])
          else:
              lgr.warning(
                  "%s has a detached HEAD, because the target commit "
                  "%s has no unique ancestor with branch '%s'",
                  repo,
                  target_commit[:8],
                  repo_orig_branch,
              )
  
imports: import logging
  from argparse import REMAINDER
  from typing import Dict
  from datalad.cmd import CommandError
  from datalad.config import ConfigManager
  from datalad.distribution.dataset import Dataset, EnsureDataset, datasetmethod, require_dataset, resolve_path
  from datalad.interface.base import Interface, build_doc, eval_results
  from datalad.interface.common_opts import location_description, reckless_opt
  from datalad.interface.results import get_status_dict
  from datalad.support.annexrepo import AnnexRepo
  from datalad.support.constraints import EnsureKeyChoice, EnsureNone, EnsureStr
  from datalad.support.exceptions import CapturedException
  from datalad.support.network import RI, PathRI
  from datalad.support.param import Parameter
  from datalad.utils import knows_annex, PurePath, rmtree
  from .clone_utils import _check_autoenable_special_remotes, _format_clone_errors, _generate_candidate_clone_sources, _get_remote, _get_tracking_source, _map_urls, _test_existing_clone_target, _try_clone_candidates, decode_source_spec, postclone_preannex_cfg_ria, postclonecfg_ria
label_desc: Use image node_id 8 for calling a global function with example usage: postclone_checkout_commit(repo, target_commit, remote) without return types